Dermatomyositis is a disease characterized by inflammation of the muscles and the presence of skin rashes. Symptoms may include pain and stiffness in muscles, muscle weakness, difficulty breathing, difficulty swallowing food, and rashes. The treatment includes taking corticosteroids and drugs that suppress the immune system, as well as doing moderate exercise. If the condition is associated with cancer, known as paraneoplastic dermatomyositis, the solution is to remove the tumour. There is also a version of this disease that affects children, called juvenile dermatomyositis.